12697251 has 16 divisors (see below), whose sum is σ = 19409664. Its totient is φ = 7232544.

The previous prime is 12697207. The next prime is 12697261. The reversal of 12697251 is 15279621.

It is not a de Polignac number, because 12697251 - 2⁷ = 12697123 is a prime.

It is a super-2 number, since 2×12697251² = 322440365914002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12697261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7576 + ... + 9098.

It is an arithmetic number, because the mean of its divisors is an integer number (1213104).

Almost surely, 2^12697251 is an apocalyptic number.

12697251 is a deficient number, since it is larger than the sum of its proper divisors (6712413).

12697251 is a wasteful number, since it uses less digits than its factorization.

12697251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930.

The product of its digits is 7560, while the sum is 33.

The square root of 12697251 is about 3563.3202213666. The cubic root of 12697251 is about 233.2938202933.

The spelling of 12697251 in words is "twelve million, six hundred ninety-seven thousand, two hundred fifty-one".